package com.imooc;
import java.util.Scanner;
public class IfElseDemo {

	public static void main(String[] args) {
		
		System.out.println("请输入成绩");
		Scanner sc = new Scanner(System.in);
		int score = sc.nextInt();
		if(score>=90) {
			System.out.println("优");
		}else if(score>=80 && score<90) {
			System.out.println("良");
		}else if(score>=70 && score<80) {
			System.out.println("中");
		}else if(score>=60 && score<70) {
			System.out.println("及格");
		}else {
			System.out.println("差");
		}
	}
}
